Best suspension setting for front and rear springs

I have a 2015 Polaris Sportsman 1000 XP all stock suspension and tires. I am a bigger guy 6ft 2 295lbs. I was wondering if anyone knew what would be the best setting on the springs for trail ridding front and rear. I just got back from Hatfield and McCoy and I had several incidents where I bottomed out the supspension. Any advice or guidance would be greatly appreciated.